<template>
  <li @mouseenter="handleEnter(true)" @mouseleave="handleEnter(false)" :style="{background :bgColor}">
    <label>
      <input type="checkbox" v-model="todo.complete"/>
      <span>{{todo.title}}</span>
    </label>
    <button class="btn btn-danger" v-show="isShow" @click="deleteItem">删除</button>
  </li>
</template>

<script>
import PubSub from 'pubsub-js'
export default {
name: "TodoItem",
  props: {
    todo: Object,
    index: Number,

  },
  data(){
    return {
      bgColor:'white',
      isShow: false
    }
  },
  methods: {
    handleEnter (isEnter) {
      if (isEnter){
        this.bgColor='gray'
        this.isShow = true
      } else {
        this.bgColor = 'white'
        this.isShow = false
      }

    },
    deleteItem () {
      const {todo, index, deleteTodo} = this
      if (window.confirm(`确认删除${todo.title}吗`)){
        // deleteTodo(index)
        PubSub.publish('deleteTodo',index)
      }
    }
  }
}
</script>

<style scoped>
/*item*/
li {
  list-style: none;
  height: 36px;
  line-height: 36px;
  padding: 0 5px;
  border-bottom: 1px solid #ddd;
}

li label {
  float: left;
  cursor: pointer;
}

li label li input {
  vertical-align: middle;
  margin-right: 6px;
  position: relative;
  top: -1px;
}

li button {
  float: right;
  /*display: none;*/
  margin-top: 3px;

}

li:before {
  content: initial;
}

li:last-child {
  border-bottom: none;
}
</style>
